import type { ToolDefinition } from "../types.js";
import type { EventBus } from "../events.js";

export class ToolRegistry {
  private readonly tools = new Map<string, ToolDefinition<any>>();

  constructor(private readonly events: EventBus) {}

  async register(tool: ToolDefinition<any>): Promise<void> {
    if (this.tools.has(tool.name)) {
      throw new Error(`Tool already registered: ${tool.name}`);
    }
    this.tools.set(tool.name, tool);
    await this.events.emit("tool.registered", { tool: tool.name });
  }

  list(): ToolDefinition<any>[] {
    return [...this.tools.values()];
  }

  get(name: string): ToolDefinition<any> | undefined {
    return this.tools.get(name);
  }
}